Texas Instruments OPAx387 Precision Zero-Drift Op Amps

Texas Instruments OPAx387 Precision Zero-Drift Operational Amplifiers (Op Amps) comes with zero-drift technology, provides an offset voltage and offset drift that gives unparalleled long-term stability. With a mere 570µA of quiescent current, the OPAx387 can achieve 5.7MHz of bandwidth, a broadband noise of 8.5 V/√Hz, and a 1/f noise, at 177nVPP. These specifications are crucial to achieving extremely-high precision and no degradation of linearity in 16-bit to 24-bit analog to digital converters (ADCs). The Texas Instruments OPAx387 features a flat bias current over-temperature, and therefore, little to no calibration is needed in high input impedance applications over temperature. All versions are specified over the industrial temperature range of –40°C to +125°C.

Features

  • ±2µV (maximum, tested) ultra-low offset voltage
  • ±0.003µV/°C zero drift
  • 135pA (maximum, tested) low-input bias current
  • 8.5nV√Hz at 1kHz low noise
  • 177nVPP (0.1Hz to 10Hz) no 1/f noise
  • Common-mode input range ±100mV beyond supply rails
  • 5.7MHz gain bandwidth
  • 570µA per amplifier quiescent current
  • 1.7V to 5.5V single supply
  • ±0.85V to ±2.75V dual supply
  • EMI/RFI filtered inputs

Applications

  • Electronic thermometer
  • Weigh scale
  • Temperature transmitter
  • Ventilators
  • Data acquisition (DAQ)
  • Semiconductor test
  • Lab and field instrumentation
  • Merchant network and server PSU
  • Analog input module
  • Pressure transmitter

Functional Block Diagram

Block Diagram - Texas Instruments OPAx387 Precision Zero-Drift Op Amps
Publicado: 2021-01-19 | Actualizado: 2024-01-29